Cloth board for axminster looms



p 1950 V w. Y. ROBB 2,523,061

CLOTH BOARD FOR AXMINSTER LOOMS Filed Nov. 8, 1947 INVENTOR WALTER Y. ROBB ATTORNEY i atentedsept. 19, 1950 s PATENT OFFICE CLOTH BOARD FOR AXMINS TER LOOMS Walter Y. Robb, Whitinsville, Mass, assignorto 'Crompton & KnowlesLoom Works, Worcester, Mass, a corporation of Massachusetts Application November 8, 1947, Serial No. 784,850

, 5 Claims. (01. 139-7) This invention relates to improvements in Axminster looms and it is the general object of the invention toprovide a cloth or nose board so constructed as to guide the tuft yarns during a tuft forming operation of the loom.

Axlminster looms operate with. tube frames each of which is provided with a large number of yarn tubes from which colored tuft forming yarns project. During a tuft forming operation the yarn tubes-are dipped through the warp sheds to carry the tuft yarns below the bottom binder warps. The tube frame is then raised and the lay pushes the tufts up along teeth on the board and then forwardly over hooks at the tops of the teeth. In the past the rear surfaces of the teeth have been smooth with the result that they have not been able to align the tuft yarns preparatory to tuft formation. It is an important object of my present invention to form these teeth with grooves which receive the tuft of the upward movement of the tube frame.

With these and other objects in view which Will appear 'as the description proceeds, my invention resides in the combination and arrangement of parts hereinafter described and set forth.

In the accom anying drawings, wherein a convenient embodiment of my invention is set forth:

Fig. 1 is a side elevation of partof an Axminster loom having my improved cloth or nose board applied thereto, parts being in section,

Fig. 2 is an enlarged front elevation of the cloth board shown in Fig. 1 showing the tuft yarn tubes in low position,

Fig. 3 is a plan view looking in the direction of arrow 3, Fig. 2,

Fig. 4. is a, detailed vertical section on line 44" of Fig. 3 through one of the teeth and showing the tuft yarn guiding groove,

Fig. 5 is a view similar to part of Fig. 2 but showing the tuft yarn tubes in a higher position with the yarn in the guide grooves of the teeth,

and

T Fig. 6 is a detailed rear elevation looking in the direction of arrow 6, Fig.5.

Referring particularly to Fig. 1, the loom frame l0 supports a lay H provided with a reed l2. A breast beam [3 formed as a fixed part of the loom frame has secured to the upper side thereof a cloth or nose board designated generally at M. The loom operates with a plurality of tube frames one of which is indicated at l5. Each tube frame includes a yarn spool 16, a bar I1, and a large number of yarn tubes 18 through which the tuft yarns I9. extend. During a tuft forming operation a tube frame is detached from the transporting chain not shown and dipped by a transfer arm 28 to project the tuft yarns and yarn tu-bes through the sheds formed by the binders 2i and 22. The tube frame is then partly raised and the lay beats forwardly to form a tuft. A needle 23 moves into and out of the warp shed to lay double picks of weft.

On the form of nose board to which the present invention more particularly relates there is formed a number of teeth 25 separated by spaces 28 which register with the dents 21 of the reed l2. Separator plates 28 are mounted as shown in Fig. 1 forwardly of the lay, and after the tube frame has been dipped and then partly raised as already described these plates. are projected rearwardly in known manner and align with their respective reed dents, thereby forming guide channels or aisles for the tuft yarns as the lat- 0 ter curve rearwlardly and then upwardly during tuft formation.

The matter thus far described may be substantially as set forth in prior patent to Dacey and Robertson No. 1,958,129.

In the operation of the mechanism thus far described it occasionally happens that the tuft yarns l9 tend to curve to one side or the other so that they are not aligned with the spaces between the guide plates 28 before the latter move rearwardly to form the aforesaid guide aisles or channels. It is the purpose of the present invention to form the teeth 25 in such manner that they will assist in holding the tuft yarns in correct alignment, and in carrying the invention into effect I provide the rear face of each tooth 25 with a groove 35 having side walls 36. These grooves are sufficiently large and deep to receive the tuft yarns and serve as guides for them as the tube frame rises. Each tooth 25 has a. hook 3? at the top thereof, and the groove can if desired extend along the rear of the tooth.

In the operation of the invention it may be assumed that the tube frame has been dipped so that the tuft tubes I8 are in the position shown in Fig. 2 with the tuft yarns I9 projecting downwardly below the binder warps 2i and 22. The separator plates 28 will be in forward position with their upper right hand. corners in their corresponding slots 26 preparatory to rearward movement. The tube frame then rises to lift the tuft yarns to the position shown in Fig. 5, and place the tuft yarns in the grooves 35, as shown in Fig. 5. After the tuft yarns are thus aligned the plates 28 move rearwardly toward the reed dents. In a later stage of the operation as the reed inoves forwardly it will engage a pick of filling F behind the tuft yarns and move it upwardly and over the hooks 31. After a still further upward movement of the tube frame the tuft yarns are cut by the front and back outter plates 38 and 39, respectively. The tube frame is returned to its chains.

From the foregoing it will be seen that I have provided simple means for guiding the tuft yarns during part of the upward movement of the tube frame so that the yarns can be correctly aligned prior to rearward movement of the guide plates 28. The guide means comprise a groove in each of the teeth 25 sufficiently deep so that the ridges or edges 26- restrain lateral movement of the tuft yarns and hold them in correct alignment,

Having thus described my invention it will be seen that changes and modifications may be made therein by those skilled in the art without departing from'the spirit and scope of the invention and I do not wish to be limited to the details. herein disclosed, but what I claim is:

1 In an Axminster loom operating with a tube frame which rises preparatoryto tuft formation and from which tuft yarns extend, a nose board, and a series of teeth formed on the nose board registering with the tuft yarns, the rear face of each tooth extending upwardly and forwardly and being provided with a groove to receive and guide the tuft yarns as the tube frame rises.

2. In an Axminster loom operating with a tube frame which rises preparatory to tuft formation 3. In an Axminster loom operating with a tube frame which is dipped and then rises during the tuft forming operation, spaced separator plates 4 which move rearwardly subsequent to rising of the tube frame during the tuft forming operation, and a nose board provided with a plurality of tuft yarn engaging teeth between which the separator plates move, said teeth having their rear edges extending upwardly and forwardly and formed with tuft yarn receiving grooves which receive and align the tuft yarns as the tube frame rises prior to rearward movement of said guide plates.

4. In an Axminster loom having a tube frame which is dipped to pass tuft yarns through the warp shed and is then raised incident to a tuft forming operation, spaced separator plates which move rearwardly subsequent to rising of the tube frame during the tuft forming operation, and a nose board having spaced teeth between which said plates move, each tooth being provided with a rearwardly facing upwardly extending tuft yarn guiding groove into which the tube frame when rising places a tuft yarn prior torearward move- REFERENCES CITED lhe following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,989,029 .Stone Jan. 22, 1935 2,324,564 Dacey July 20, 1943 FOREIGN PATENTS Number Country Date 1,651 Great Britain of 1911 

